linux-kernel - Re: [PATCH] net: ethernet: ti: am65-cpsw-nuss: fix irqs type

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Message-Id: <20200506.175317.102621048517657840.davem@davemloft.net>
Date:   Wed, 06 May 2020 17:53:17 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     grygorii.strashko@...com
Cc:     netdev@...r.kernel.org, nsekhar@...com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        m-karicheri2@...com
Subject: Re: [PATCH] net: ethernet: ti: am65-cpsw-nuss: fix irqs type

From: Grygorii Strashko <grygorii.strashko@...com>
Date: Tue, 5 May 2020 19:31:26 +0300

> The K3 INTA driver, which is source TX/RX IRQs for CPSW NUSS, defines IRQs
> triggering type as EDGE by default, but triggering type for CPSW NUSS TX/RX
> IRQs has to be LEVEL as the EDGE triggering type may cause unnecessary IRQs
> triggering and NAPI scheduling for empty queues. It was discovered with
> RT-kernel.
> 
> Fix it by explicitly specifying CPSW NUSS TX/RX IRQ type as
> IRQF_TRIGGER_HIGH.
> 
> Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>

Applied, thanks.